My friend tries to make a dolphin house but the dolphins kept pushing the wall. I guess they tried to breathe, I wonder is there any way to prevent that happen? Some sort of summoning command I could use? Thanks!
Well, a conduit doesn't seem to work and I couldn't keep them alive with a command block giving the water_breathing effect though I'm not absolutely certain I wrote the command correctly.
Couldn't they leave some air space at the top?
I had typed the command incorrectly, when I did it right it did keep both dolphins and villagers alive and happy underwater.
The command I used was:
effect give @e minecraft:water_breathing 100000
which could be improved, it gives the effect to all entities within range, loaded chunks presumably, for 100000 seconds (?), ticks perhaps, several times a second.